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Methane flux across the air-water interface - Air velocity effectsMethane loss to the atmosphere from flooded wetlands is influenced by the degree of supersaturation and wind stress at the water surface. Measurements in freshwater ponds in the St. Marks Wildlife Refuge, Florida, demonstrated that for the combined variability of CH4 concentrations in surface water and air velocity over the water surface, CH4 flux varied from 0.01 to 1.22 g/sq m/day. The liquid exchange coefficient for a two-layer model of the gas-liquid interface was calculated as 1.7 cm/h for CH4 at air velocity of zero and as 1.1 + 1.2 v to the 1.96th power cm/h for air velocities from 1.4 to 3.5 m/s and water temperatures of 20 C.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Sebacher, D. I.
(NASA Langley Research Center Hampton, VA, United States)
Harriss, R. C.
(NASA Langley Research Center Hampton, VA, United States)
Bartlett, K. B.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 11, 2013
Publication Date
April 1, 1983
Publication Information
Publication: Tellus
Subject Category
Accession Number
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